Learn all about the liver with this anatomy sheet. Our liver is one of many organs in the digestive system expelling waste from the body.

The horned lizard has a scary exterior but a gentle personality. Your little student can learn about this North American lizard with this worksheet.

Learn about the animal kingdom with this centipede anatomy worksheet. Fun fact: Centipedes have either 15 or 17 pairs of legs, but never 16!

Butterflies and moths may have very different colors, but they are from the same insect order! Learn about lepidoptera with a fun coloring page.

Learn about the farthest planet in our solar system, Neptune. Facts include interesting bits about the vast winds that keep its surface moving!

Did you know that each tree tells a story? In this worksheet, children peer inside a tree to learn about the layers in its trunk.

Did you know chameleons can sleep upside-down? Learn more about chameleons with this fun worksheet, jam-packed with fun facts and activities!

Children learn to identify the tracks of a pine marten, chipmunk, mountain lion, mountain goat, and grizzly bear in this matching worksheet.

Almost half of all known fish species call ponds, lakes, rivers, and other freshwater habitats home. Learn about freshwater fish in this worksheet.

Put your kid's observational skills to the test with this word search that will help her learn some of the animals that inhabit a rainforest.

Some people think alligators and crocodiles are the same, but there are some distinct differences. Check out this cool worksheet to learn what they are.

Coyotes' famous howl gave them the nickname "song dogs." This is just one of several coyote facts your child can learn from this worksheet.

In this worksheet, kids learn about basic physics concepts like mass, momentum, and velocity by applying them to a popular winter sport: slalom skiing!

The silverback gorilla is a special animal. This magnificent male is part of an endangered species. Complete this sheet to learn all about this gentle giant.

Learn about drag, air resistance, and Newton's laws with this cool worksheet on bobsled physics!

What is the difference between condensation and evaporation? Learn about natural cooling and heating processes that are caused by changing states of matter!

Learn all about light refraction by simply placing your pencil in a glass of water. Warning: your pencil may not be quiet the same afterward.

Can you guess how the Screech Owl got its name? Learn some fun facts about this species of owl with a fun info sheet!

Learn about the great horned owl of Yellowstone National Park, a bird so big and mean that it has the nickname, "tiger owl."

What makes a reptile different from an amphibian?  Learn all about animal classifications in this worksheet for second and third graders!

Use the clues in this crossword puzzle to fill in the blanks with different types of snake names. Learn interesting facts about snakes as you go!